Fix badge and tweak README text about state of v2.0.0. (#623)

Author: jhump

README.md

@@ -5,22 +5,21 @@
 This repo builds on top of the reflection capabilities in the [Protobuf runtime for Go](https://pkg.go.dev/google.golang.org/protobuf/reflect/protoreflect)
 and also provides reflection APIs for [gRPC](https://grpc.io/) as well.
 
-[![GoDoc](https://pkg.go.dev/github.com/jhump/protoreflect/v2?status.svg)](https://pkg.go.dev/github.com/jhump/protoreflect/v2)
+[![GoDoc](https://pkg.go.dev/badge/github.com/jhump/protoreflect/v2.svg)](https://pkg.go.dev/github.com/jhump/protoreflect/v2)
 
 > [!NOTE]
-> This v2 branch is a work in progress. It is basically feature complete, but still needs more tests for
-> the new functionality and may also need some changes to the API to ensure long-term compatibility with
-> interfaces in the Protobuf Go runtime.
+> Version 2.0.0 is still a work in progress. It is basically feature complete, but still needs more tests
+> for the new functionality.
 >
 > You can try it out by getting a pre-release version:
 > ```
 > go get github.com/jhump/protoreflect/[email protected]
 > ```
 >
-> Note that the APIs are likely to change a little bit between now and a formal v2 release. Also note
-> that some packages in the v2 still need more tests, so you may find some bugs, but that is mostly
-> for new functionality. If you're just trying to update your code from v1 of this repo, those packages
-> should be rock-solid and least likely to see any further API changes.
+> Note that the APIs may change a little bit between now and a final v2.0.0 release. Also note
+> that some packages in v2 still need more tests, so you may find some bugs. But that should mostly
+> be for new functionality. If you're just trying to update your code from v1 of this repo, those
+> packages should be rock-solid and least likely to see any further API changes.
 
 ----
 ## Descriptors and Reflection Utilities